How will the magnetic field internsity at the centre of circular coil carrying current change, if the current through the coil is doubled and the radius of the coil is halved?

How will the magnetic field intensity, at the centre of a circular coil carrying currents, change if the current through the coil is doubled and radius of the coil is halved ?

Magnetic field intensity H at the centre of a circular loop of radius r carrying current I e.m.u is

At the centre of a circular coil carrying current, the magnetic filed is________.

Determine the magnetic induction at the centre of a circular coil of radius r carrying a current I with the help of the Biot-Savart law.

The radius of each of two circular coils of single turn is r. The two coils are placed parallel to each other with a common axis. The distance between their centres is (r)/(2) . If equal current is sent through the two coils in the same direction, what will be the magnetic field (i) at the centre of each coil and (ii) at the mid point on the line joining the centres of the coils? What is the ratio of these two magnetic fields?

The ratio of magnetic field and magnetic moment at the centre of a current carrying circular loop is x. When both the current and radius is doubled the ratio will be

Ratio of magnetic fields at the centre of a current carrying coil of radius r and at a distance 3r on its axis is

The ratio of the inductances of two coils is 1 : 2 and that of the currents through them is 2 : 1. Find the ratio of energy stored in the coils.

A steady current is flowing through a long wire. If it is converted into a single turn circular coil, the magnetic field produced at its is B. Now it is converted into a circular coil having n tunrs. What will be the magnetic field at the centre of the coil ?

How does the magnetic moment of a circular coil vary with its radius?